El-Ashry, M. T. (1992). Natural resource management and agricultural productivity in Sub-Saharan Africa. Technical Advisory Division, International Fund for Agricultural Development.
Цитирование в стиле Чикаго (17-е изд.)El-Ashry, Mohamed T. Natural Resource Management and Agricultural Productivity in Sub-Saharan Africa. Rome: Technical Advisory Division, International Fund for Agricultural Development, 1992.
Цитирование MLA (9-е изд.)El-Ashry, Mohamed T. Natural Resource Management and Agricultural Productivity in Sub-Saharan Africa. Technical Advisory Division, International Fund for Agricultural Development, 1992.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.